Eva Kor, a Mengele twin and Auschwitz survivor, was giving a talk on campus that semester, and I encouraged my students to go hear her. What could be more relevant? “Extra credit?” someone asked. The question made me crazy with exasperation. Here’s a woman who survived the Nazis, I said, and you want me to turn her life into points to add to your grade? I couldn’t do that. The best kind of extra credit, as I told those students and still tell my students, is the kind you give yourself: by working harder on an essay, by doing some extra reading, by taking in an exhibit or lecture for its own sake, because you might find it interesting, because you might learn something.